CN204758693U - A electrical measurement device for building intelligent electric system of using - Google Patents

Abstract

The utility model discloses an electrical measurement device for building intelligent electric system of using, the manager comprises a control unit, the control unit links to each other with power module, and the control unit still communicates with radio communication unit, clock unit, liquid crystal display unit and electric quantity detection unit respectively, the electric quantity detection unit includes the partial pressure unit, and the live wire of the one end and gate of partial pressure unit links to each other, and the other end links to each other with the ADE7753 chip, and the electric quantity detection unit still includes current transformer, and current transformer's input links to each other with the live wire and with electrical apparatus respectively, and the output is connected to the ADE7753 chip, and the serial ports of ADE7753 chip links to each other with MSP430 singlechip IO mouth. The adoption takes the meritorious ADE7753 electric energy measurement integrated circuit with apparent energy measurement of serial interface and pulse output's high accuracy to realize that signal of voltage and current's collection input, power calculate and pulse output to will the time and acquisition parameter information display on LCD, use TCPIP network technique for relying on simultaneously, realizes the most genuine house and does not have linearity and remote control's intellectuality.

Description

For the electrical quantity measurement arrangement of building intelligence using electricity system

Technical field

The utility model relates to the electrical quantity measurement arrangement for building intelligence using electricity system.

Background technology

Along with the arriving of information age, how more efficiently to utilize the energy, economize energy, be given increasing concern in the world, power industry is faced with many new challenges.And intelligent building (IntelligentBuilding) is as product of the time, be the ingenious integrated of high-tech and modern architecture art, being also the symbol of synthesized economic strength, will be the trend of future development.Intelligent grid is as the requisite part of intelligent building simultaneously, and for complying with electric power development trend, intelligent grid will start some New Wave.Intelligent grid is based on traditional electrical network, the multiple technologies novel power grids such as fusion calculation machine, communication, sensing, has digitizing, robotization, informationization and interactive etc. substantially special.Along with developing rapidly of microelectric technique and VLSI (very large scale integrated circuit), electric power detection develops into the intelligent measuring control instrument based on various microprocessor, microcontroller by traditional instrument and meter based on conventional electrical circuit.

Large public building energy consumption measurement and control system is based on strong intelligent grid, and technology of Internet of things, for relying on, contains the equipment such as intelligent terminal, smart jack, intelligent switch, household network communication equipment, controlling intelligent household appliances that applicable family uses; Support the comprehensively integrated of controlling intelligent household appliances and Smart Home.Can power consumption, the electric power of each electrical appliance of remote monitoring, to each electrical appliance Long-distance Control, can gather the various extraneous factors such as environment, control electrical appliance running by predetermined scheme.The quality of life of effective raising people, makes more intelligent, the more efficient electricity consumption of people.Electrical measurement function is must relying on of intelligent power basic data acquisition, and the application does labor and introduction by the Design and implementation of electrical measurement function.

Existing building intelligence using electricity system is all rely on watt-hour meter, measures the power consumption in bed rearrangement building or a region often, and does not have radio communication function.The metering system of native system both can be used as independent watt-hour meter and use, also measurement module can be embedded among socket, switch, the topmost measurement function being to provide realtime power, adding up other indexs such as power consumption by user's requirement at times, and there is radio communication function, building intelligent using electricity system can be accessed, for intelligent power controls to provide Data support.

Utility model content

For solving the deficiency that prior art exists, the utility model discloses the electrical quantity measurement arrangement for building intelligence using electricity system, the high precision that the application adopts band serial line interface and pulse to export is gained merit and the ADE7753 electric energy measurement integrated circuit of applied power energy meter realizes the Gather and input of voltage and current signal, power calculation and pulse and exports, and by time and acquisition parameter information displaying on a liquid crystal display, simultaneously with TCP/IP network technology for relying on, realize the intellectuality of home wireless truly and Long-distance Control.

For achieving the above object, concrete scheme of the present utility model is as follows:

For the electrical quantity measurement arrangement of building intelligence using electricity system, comprise control module, described control module is connected with power module, control module also respectively with wireless communication unit, clock unit, liquid crystal display and electric power detection unit communication;

Described electric power detection unit comprises partial pressure unit, one end of partial pressure unit is connected with the live wire of circuit, the other end is connected with ADE7753 chip, electric power detection unit also comprises current transformer, the input end of current transformer is connected with live wire and electrical appliance respectively, output terminal is connected to ADE7753 chip, and the serial ports of ADE7753 chip is connected with MSP430 single-chip processor i/o mouth.

Described wireless communication unit comprises Zigbee master controller, and Zigbee master controller is wireless chip CC2530, and the ZigBee wireless transceiver circuit of wireless chip CC2530 and 2.4GHz is connected.

Described ADE7753 chip internal is integrated with second order sigma-delta ADCs, digital integrator, a reference voltage source and a temperature sensor.

Described partial pressure unit comprises resistance R13 and resistance R14, and one end of described resistance R13 is connected with live wire, and the other end is connected with one end of resistance R14, and the other end ground connection of resistance R14, resistance R14 is also parallel with electric capacity C17.

The output terminal of described current transformer is in parallel with resistance R10, one end of resistance R10 is connected with ADE7753 chip by resistance R7, the other end of resistance R10 is connected with ADE7753 chip by resistance R8, circuit between resistance R7 and ADE7753 chip is by electric capacity C15 ground connection, and the circuit between resistance R8 and ADE7753 chip is by electric capacity C16 ground connection.

The V2N end of described ADE7753 chip is by the resistance R15 that is in parallel and electric capacity C11 ground connection.

The beneficial effects of the utility model:

The application uses ZigBee technology, and using the wireless chip CC2530 of TI/Chipcon company as Zigbee master controller, its 8051 kernel is through special design, can with the ZigBee wireless transceiver circuit ideally cooperating of 2.4GHz, effectively eliminate in the past digital circuit on the impact of high-frequency communication, thus realize the wireless transmission of data, the ADE7753 electric energy measurement integrated circuit that high precision is gained merit and apparent energy measures adopting band serial line interface and pulse to export realizes the Gather and input of voltage and current signal, power calculation and pulse export, and by time and acquisition parameter information displaying on a liquid crystal display, simultaneously with TCP/IP network technology for relying on, realization home wireless truly and the intellectuality of Long-distance Control.

Accompanying drawing explanation

Fig. 1 overall system block diagram;

The minimum system figure of Fig. 2 MSP430F149;

Fig. 3 ADE7753 electric power detection electrical schematic diagram;

Fig. 4 ADE7753 electric power detection signal flows to block diagram.

Wherein, 1, control module, 2, power module, 3, electric power detection unit, 4, wireless communication unit, 5, clock unit, 6, liquid crystal display.

Embodiment:

Below in conjunction with accompanying drawing, the utility model is described in detail:

For the electrical quantity measurement arrangement of building intelligence using electricity system, comprise control module 1, described control module 1 is connected with power module 2, and control module 1 also communicates with wireless communication unit 4, clock unit 5, liquid crystal display 6 and electric power detection unit 3 respectively;

Liquid crystal display 6 is 12864 liquid crystal displays, and clock unit 5 is DS1302 clock.Control module 1 is communicated with remote control center by wireless communication unit 4.

In the design effort of system, first should in conjunction with concrete application, consider the requirement of system to various aspects such as cost, power consumption, reliability, extensibility, construction cycles, the master devices of certainty annuity, and with build system hardware platform, then according to hardware selection and the software development model of concrete application certainty annuity for core.In power testing system design, with MSP430F149 single-chip microcomputer for control core, realize integral control function, comprise input and output, signal compares, use ZigBee technology, and using the wireless chip CC2530 of TI/Chipcon company as Zigbee master controller, its 8051 kernel is through special design, can with the ZigBee wireless transceiver circuit ideally cooperating of 2.4GHz, effectively eliminate in the past digital circuit on the impact of high-frequency communication, thus realize the wireless transmission of data, the ADE7753 electric energy measurement integrated circuit that high precision is gained merit and apparent energy measures adopting band serial line interface and pulse to export realizes the Gather and input of voltage and current signal, power calculation and pulse export, and by time and acquisition parameter information displaying on a liquid crystal display, simultaneously with TCP/IP network technology for relying on, realization home wireless truly and the intellectuality of Long-distance Control.Overall system block diagram as shown in Figure 1.

Control module 1 adopts the MSP430 Series of MCU of American TI (Texas Instrument) company, be a kind of mixed-signal processor of 16 super low-power consumptions, there is the development environment of peripheral module and convenience and high-efficiency on powerful processing power, high performance analog technology, abundant sheet.MSP430F149 minimum system comprises power circuit, reset circuit, crystal oscillating circuit and Simple imitating device JATG downloading wire.MSP430F149 microprocessor minimum system electrical schematic diagram as shown in Figure 2.In crystal connects, the low speed crystal between XIN and XOUT adopts the wristwatch crystal of 32768HZ, adopts the high speed crystal of 8MHZ between X2IN and X2OUT; The connection of Simple imitating device JATG circuit and circuit board adopts the P1 connector of 14 pins.

Electric power detection unit 3 adopts ADE7753 electric power detection chip, and ADE7753 is electric energy metrical SOC (system on a chip) (SOC) chip of a function advanced person of ADI company.ADE7753 inside is integrated with second order sigma-delta ADCs, digital integrator (on current channel), a reference voltage source and a temperature sensor, can calculate voltage, current effective value (RMS), can carry out gaining merit, idle and apparent power measurement.Particularly in its sheet, digital integrator has the phase shift of-90 °, the decay peace treaty of-20dB/dec, its phase-frequency response and amplitude-frequency response ideal.Digital integrator provides direct interface to differential current sensing, eliminates outside analogue integrator, both ensure that long-time stability, again with high-precision voltage, current channel phase matching.

ADE7753 has practical electric quantity monitoring, function of measuring.ADE7753 comprises the active energy register at least keeping some seconds full load cumulative power, apparent electric energy register and voltage, a current effective value, reads to obtain the data of ADE7753 by serial port.It provides a pulse proportional with meritorious energy to export (CF) simultaneously, except effective value calculates, except the information of meritorious and apparent energy, ADE7753 provides one to have the quadergy information of symbol and various system calibration feature, such as: passage bias calibration, phase alignment and energy calibration.It is also integrated with the testing circuit that a detection line voltage levels falls, and can send power down and overvoltage early warning in advance.

ADE7753 has optional positive accumulation mode, so only just carries out the accumulation of energy when positive energy being detected.When empty, internal dead thresholding guarantees that ADE7753 does not export.Cross zero output (ZX) and produce the output signal synchronous with line voltage zero-cross, ZX signal can be used to slotted line voltage cycle, and it is also gained merit for chip internal the period regulation pattern of energy and apparent energy.This just can calibrate energy computation results sooner, more accurately.This signal also may be used for and line voltage zero-cross synchronously transfer relay, prevents arcing.

ADE7753 circuit is by the current/voltage analog signal figure of sampling, and in current channel, Hi-pass filter (HPF) has filtered the flip-flop in input signal, is reduced into current signal by digital integrator.Voltage signal sends into voltage channel, is multiplied can obtains applied power through analog/digital conversion after phase correction with current signal.The effective value of voltage and current is multiplied acquisition active power.Active power signal being exported by CF pin by number/frequently conversion, sends into the register of ADE7753 together with voltage signal, current signal, applied power signal simultaneously, to export and be connected to the I/O mouth of single-chip microcomputer with serial line interface through DOUT pin.So not only can detect parameters, but also higher precision can be obtained.This is highly significant to the accuracy class of raising whole system.

ADE7753 electric power detection electrical schematic diagram: actual when using, first carries out dividing potential drop by an a 600K and 1K fixed resistance, obtains the voltage sampling signal of about 400mV, then gives ADE7753 and carry out A/D conversion.And be current forms from the signal of mutual inductor, need the current measurement passage being converted to the signal feeding ADE7753 of voltage form through resistance.The serial ports of ADE7753 is connected with MSP430 single-chip processor i/o mouth.When system power-up or when resetting, putting CS is effective low level, writes register command word simultaneously, determine its mode of operation by the DIN pin of serial ports to ADE7753.The tested current signal that electronic mutual inductor sensing head exports sends into V1 passage from V1P/V1N port, voltage signal sends into V2 passage from V2P port, access ADC is amplified, by incoming serial interface after subsequent treatment by programmable gain amplifier (PGA).When R10 resistance is 10 Europe, passage one gain is 1; Wherein passage two gain is 1.Its periphery circuit design as shown in Figure 3.Voltage channel V2 take zero line as benchmark, completes the voltage input calibration of instrument with resitstance voltage divider R13 and R14.

ADE7753 detection method of quantity of electricity: MCU counts P5.7 port within the integral time that timer internal sets, and average power is proportional to average frequency, is determined by following formula:

Average power=average frequency=pulse number/integral time (1)

At the electric energy of an integration period internal consumption be:

Electric energy=average power × integral time=(pulse number/integral time) × integral time=pulse number (2)

ADE7753 electric power detection signal flows to block diagram as shown in Figure 4.

Digitized electric current is directly multiplied with voltage signal by ADE7755, obtains instantaneous power signal.Its computing formula as

V(t)＝V×cos(ωt)(3)

I(t)＝I×cos(ωt)(4)

$P\left(t\right)=V\left(t\right)\×I\left(t\right)=\frac{VI}{2}\×\[1\×cos\left(2\mathrm{\ω}T\right)\]---\left(5\right)$

It is by the accumulative generation to above-mentioned active power information that the low frequency of ADE7755 exports, and namely export through cumulative for a long time between pulse at two, therefore output frequency is proportional to average active power.When this average active power information is added up (such as being added up by counter) further, just electric energy metrical information can be obtained.

The application achieves the building energy consumption measurement and control system electric power detection modular design based on MSP430F149 single-chip microcomputer.We for control core, use ZigBee wireless communication technology, TCP/IP network technology etc. with MSP430F149 single-chip microcomputer, realization home wireless truly and the intellectuality of Long-distance Control.Native system has the advantages such as super low-power consumption, high precision, low cost, interface is simple, has good antijamming capability simultaneously.

By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.

Claims (5)

1. for the electrical quantity measurement arrangement of building intelligence using electricity system, it is characterized in that, comprise control module, described control module is connected with power module, control module also respectively with wireless communication unit, clock unit, liquid crystal display and electric power detection unit communication;

Described electric power detection unit comprises partial pressure unit, one end of partial pressure unit is connected with the live wire of circuit, the other end is connected with ADE7753 chip, electric power detection unit also comprises current transformer, the input end of current transformer is connected with live wire and electrical appliance respectively, output terminal is connected to ADE7753 chip, and the serial ports of ADE7753 chip is connected with MSP430 single-chip processor i/o mouth.

2. as claimed in claim 1 for the electrical quantity measurement arrangement of building intelligence using electricity system, it is characterized in that, described wireless communication unit comprises Zigbee master controller, and Zigbee master controller is wireless chip CC2530, and the ZigBee wireless transceiver circuit of wireless chip CC2530 and 2.4GHz is connected.

3. as claimed in claim 1 for the electrical quantity measurement arrangement of building intelligence using electricity system, it is characterized in that, described partial pressure unit comprises resistance R13 and resistance R14, one end of described resistance R13 is connected with live wire, the other end is connected with one end of resistance R14, the other end ground connection of resistance R14, resistance R14 is also parallel with electric capacity C17.

4. as claimed in claim 1 for the electrical quantity measurement arrangement of building intelligence using electricity system, it is characterized in that, the output terminal of described current transformer is in parallel with resistance R10, one end of resistance R10 is connected with ADE7753 chip by resistance R7, the other end of resistance R10 is connected with ADE7753 chip by resistance R8, circuit between resistance R7 and ADE7753 chip is by electric capacity C15 ground connection, and the circuit between resistance R8 and ADE7753 chip is by electric capacity C16 ground connection.

5. as claimed in claim 1 for the electrical quantity measurement arrangement of building intelligence using electricity system, it is characterized in that, the V2N end of described ADE7753 chip is by the resistance R15 that is in parallel and electric capacity C11 ground connection.